I just 'ordered' mine - CK3510hst.
Got cruise control - I plan to brush hog 20 acres regularly...
linked pedal - leave it at idel and when you hit the HST pedal it throttles up..just like your car does. Think it will be quieter, save fuel, but nice for general driving around/loader work/trailer towing.
Loaded tires - included free. (washer fluid)
LED worklights I'll ad. Bought a set of 4 for last tractor, only needed 2.
Got 1 rear remote - mostly for hydraulic top link. BUT could, with a long hose, run it up front for snow blade or grapple. It's a center and detent - so can use it for left/right or just leave it on and put a second control elsewhere if it's more convenient.
Stabilizer bars..my kubota has no adjustment and never needed it..so didn't bother with it. The SE model includes it (and a lot more (but is $3500 up charge...)
My old kubota (74
L175) started all winter even at -4 with no heater...dealer says nobody gets them...
Mirrors - got them too - my neck/shoulder kills me when I do a lot of turning around for box blading and such. We'll see how well they work in the real world. $64 so not a budget buster.
And armrest for loader side..$84..maybe a waste but not sure, so why not?
I always liked the specs of that model. Here is what I would want on it if it wasn't already so equipped:
3rd function for a grapple, or one or two rear hydraulic remotes
3pt stabilizer bars and extendable lower arms
Rear wheel weights or loaded tires
engine heater?
Eeasy enough to add your own LED work lights
I just added a mirror to my tractor, which I used to think was silly, but I sure do like havig it.